A passenger car suspension spring

Abstract

The present invention belongs to the technical field of automobile shock-absorbing spring press-fitting, and specifically relates to a passenger car suspension spring; it comprises a spring upper pad, a coil spring, a spring lower pad, a lower control arm, a pressure cover, a pressure rod, a nylon pad, an anti-rotation pressure block and a bearing nut, wherein the top of the spring lower pad is fitted and connected to the bottom of the coil spring, and the bottom of the spring lower pad is fitted and connected to the lower control arm; the top of the pressure rod is fitted in the pressure cover, and the body of the pressure rod passes through the coil spring and the lower control arm in sequence, so that the pressure cover is fitted in the upper part of the coil spring, the lower part of the spring upper pad is fitted and connected to the top of the coil spring, the part of the pressure rod passing through the lower control arm is fastened to the lower control arm through the bearing nut, and a nylon pad and an anti-rotation pressure block are sequentially sleeved on the outside of the pressure rod between the lower control arm and the bearing nut; the present invention aims to solve the problem of offline pre-pressing of suspension shock-absorbing springs of specific structures, and is a new type of press-fitting method, which can realize offline pre-pressing of shock-absorbing springs.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile shock-absorbing spring press-assembly, and in particular relates to a passenger car suspension spring. Background Art

[0002] Shock absorber springs are an essential structure for passenger car suspensions. They act as shock absorbers during vehicle travel and ensure vehicle stability. Different shock absorber spring structures require different assembly methods. The most widely used spring assembly methods in the industry currently include offline pre-pressing, online pressing, and robotic arm pressing after assembly. Offline pre-pressing is applicable when the spring and vehicle body are not precisely aligned, the upper and lower spring pads are made of hard materials, and the upper and lower spring pads have a fixed structure. Online pressing is applicable when the spring and vehicle body require precise alignment, the upper and lower spring pads are made of soft materials, the upper and lower spring pads have no fixed structure, and the production cycle is less than 50 JPH. Robotic arm pressing after assembly is applicable when the spring and vehicle body require precise alignment, and the upper and lower spring pads have no fixed structure.

[0003] The product structure of some existing vehicle models is developed by online pressing, and there is a lack of mature and effective offline pre-pressing methods. However, online pressing will increase the working hours of chassis assembly, and there will be a cycle bottleneck for production lines with faster production cycles, resulting in waste of production line resources and increased production costs. Therefore, it is necessary to find a simple and effective offline spring pressing method.

[0004] In summary, the current technical problem in this field is that for suspension shock absorber springs of specific product structures (for example: FMA platform), the springs cannot be pressed online through chassis assembly because the assembly cycle does not meet the production line requirements. At the same time, since the upper and lower pads of the spring are made of soft materials and have no fixed structure, the spring pressing requirements cannot be achieved through the existing offline pressing process technology. Summary of the Invention

[0005] In order to overcome the above problems, the present invention provides a passenger car suspension spring; it aims to solve the problem of offline pre-pressing of suspension shock-absorbing springs with specific structures, and is a new press-fitting method that can realize offline pre-pressing of shock-absorbing springs.

[0006] A passenger car suspension spring comprises an upper spring pad 1, a coil spring 2, a lower spring pad 3, a lower control arm 4, a pressure cover 5, a pressure rod 6, a nylon pad 7, an anti-rotation pressure block 8 and a bearing nut 9, wherein the top of the lower spring pad 3 is fitted and connected to the bottom of the coil spring 2, and the bottom of the lower spring pad 3 is fitted and connected to the lower control arm 4; the top of the pressure rod 6 is fitted in the pressure cover 5, and the body of the pressure rod 6 passes through the coil spring 2 and the lower control arm 4 in sequence, so that the pressure cover 5 is fitted in the upper part of the coil spring 2, the lower part of the upper spring pad 1 is fitted and connected to the top of the coil spring 2, the part of the pressure rod 6 passing through the lower control arm 4 is fastened to the lower control arm 4 through the bearing nut 9, and the nylon pad 7 and the anti-rotation pressure block 8 are sequentially sleeved on the outside of the pressure rod 6 between the lower control arm 4 and the bearing nut 9.

[0007] A limiting structure 31 is provided above the spring lower pad 3 and a positioning protrusion 32 is provided at the bottom. The lower end of the coil spring 2 is aligned with the limiting structure 31, and the positioning protrusion 32 is fitted and connected to the positioning hole 41 on the lower control arm 4.

[0008] A spiral profile 51 is provided on the outer ring of the bottom of the pressure cover 5, which is consistent with the spiral angle of the coil spring 2, so that the pressure cover 5 can be connected with the coil spring 2; and a through hole is provided in the middle of the pressure cover 5 for passing the pressure rod 6, and the inner wall of the through hole is provided with a straight-through groove 52 and a locking groove 53 arranged at intervals.

[0009] A locking block 61 is provided above the pressure rod 6, and a key slot 62 is provided inside the lower part of the pressure rod 6, wherein the top of the pressure rod 6 passes through the through hole in the middle of the pressure cover 5, and at this time the locking block 61 passes through the straight groove 52, and then the pressure rod 6 is rotated so that the locking block 61 fits in the locking groove 53, completing the fixation of the pressure cover 5 and the pressure rod 6.

[0010] The nylon pad 7 is sleeved on the anti-rotation pressure block 8, and the nylon pad 7 and the anti-rotation pressure block 8 are sleeved on the pressure rod 6 as a whole, and the positioning key 81 on the anti-rotation pressure block 8 is matched and connected in the keyway 62.

[0011] The interior of the bearing nut 9 is a trapezoidal thread, and an end bearing 91 is embedded therein. The bearing nut 9 is fitted to the exterior below the pressure rod 6 through the end bearing 91 and the trapezoidal thread.

[0012] Beneficial effects of the present invention:

[0013] The present invention realizes the offline pre-compression installation of the shock-absorbing spring, and can simultaneously ensure the main line operation rhythm, improve production efficiency, save production costs, and at the same time ensure that the spring press-installation is safe and reliable, avoiding potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the partial structural decomposition of the coil spring of the present invention.

[0017] Figure 3 This is a schematic diagram of the connection above the spring lower pad of the present invention.

[0018] Figure 4 This is a schematic diagram of the connection below the spring lower pad of the present invention.

[0019] Figure 5 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 6 This is a schematic diagram of the top structure of the upper cover of the present invention.

[0021] Figure 7 This is a schematic diagram of the bottom structure of the upper cover of the present invention.

[0022] Figure 8 It is a schematic diagram of the pressure rod structure of the present invention.

[0023] Figure 9 This is a schematic diagram of the nylon pad structure of the present invention.

[0024] Figure 10 This is a schematic diagram of the anti-rotation pressure block structure of the present invention.

[0025] Figure 11 This is a structural schematic diagram of the bearing nut of the present invention.

[0026] Among them: spring upper gasket 1, coil spring 2, spring lower gasket 3, limiting structure 31, positioning protrusion 32, lower control arm 4, positioning hole 41, pressure cover 5, spiral profile 51, straight-through groove 52, locking groove 53, pressure rod 6, locking block 61, keyway 62, nylon pad 7, anti-rotation pressure block 8, positioning key 81, bearing nut 9, end bearing 91. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0028] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] Example 1

[0032] A passenger car suspension spring comprises an upper spring pad 1, a coil spring 2, a lower spring pad 3, a lower control arm 4, a pressure cover 5, a pressure rod 6, a nylon pad 7, an anti-rotation pressure block 8 and a bearing nut 9, wherein the top of the lower spring pad 3 is fitted and connected to the bottom of the coil spring 2, and the bottom of the lower spring pad 3 is fitted and connected to the lower control arm 4; the top of the pressure rod 6 is fitted in the pressure cover 5, and the body of the pressure rod 6 passes through the coil spring 2 and the lower control arm 4 in sequence, so that the pressure cover 5 is fitted in the upper part of the coil spring 2, the lower part of the upper spring pad 1 is fitted and connected to the top of the coil spring 2, the part of the pressure rod 6 passing through the lower control arm 4 is fastened to the lower control arm 4 through the bearing nut 9, and the nylon pad 7 and the anti-rotation pressure block 8 are sequentially sleeved on the outside of the pressure rod 6 between the lower control arm 4 and the bearing nut 9.

[0033] A limiting structure 31 is provided above the spring lower pad 3 and a positioning protrusion 32 is provided at the bottom. The lower end of the coil spring 2 is aligned with the limiting structure 31, and the positioning protrusion 32 is fitted and connected to the positioning hole 41 on the lower control arm 4.

[0034] A spiral profile 51 is provided on the outer ring of the bottom of the pressure cover 5, which is consistent with the spiral angle of the coil spring 2, so that the pressure cover 5 can be connected with the coil spring 2; and a through hole is provided in the middle of the pressure cover 5 for passing the pressure rod 6, and the inner wall of the through hole is provided with a straight-through groove 52 and a locking groove 53 arranged at intervals.

[0035] A locking block 61 is provided above the pressure rod 6, a trapezoidal thread is provided below, and a keyway 63 is provided inside the lower part of the pressure rod 6, wherein the top of the pressure rod 6 passes through the through hole in the middle of the pressure cover 5, and at this time the locking block 61 passes through the straight groove 52, and then the pressure rod 6 is rotated so that the locking block 61 fits in the locking groove 53, completing the fixation of the pressure cover 5 and the pressure rod 6.

[0036] The nylon pad 7 is sleeved on the anti-rotation pressure block 8, and the nylon pad 7 and the anti-rotation pressure block 8 are sleeved on the pressure rod 6 as a whole, and the positioning key 81 on the anti-rotation pressure block 8 is matched and connected in the keyway 63.

[0037] The interior of the bearing nut 9 is Trapezoidal thread , and an end bearing 91 is embedded inside it. The bearing nut 9 is fitted to the outside below the pressure rod 6 through the end bearing 91 and the trapezoidal thread inside it.

[0038] Example 2

[0039] FMA Platform Definition: FMA, short for "Infinite Equation FMA Architecture," is a user-centric automotive technology architecture that maximizes user value variables based on objective vehicle manufacturing principles. This architecture prioritizes user perception. In simple terms, it leverages passenger vehicle manufacturing experience, builds on its inherent safety and controllability, and integrates the latest intelligent connectivity and driver assistance technologies to create a new, more flexible, and diverse modular vehicle architecture that meets the needs of diverse user groups.

[0040] FMA platform shock absorber spring structure, such as Figure 2 As shown, it consists of four parts: an upper spring pad 1, a coil spring 2, a lower spring pad 3, and a lower control arm 4. The upper and lower pads are both made of rubber, which is soft and cannot bear pressure alone. The lower part of the upper spring pad 1 cooperates with the coil spring 2, and the upper part cooperates with the vehicle body floor; the upper part of the lower spring pad 3 cooperates with the coil spring 2, and the lower part cooperates with the lower control arm 4. After assembly, the coil spring 2 is fixed between the vehicle body floor and the lower control arm 4 under pressure. The overall effect after assembly is as shown in FIG. Figure 3 shown.

[0041] During the press-fitting process of the coil spring 2, the upper spring pad 1 and the coil spring 2 are not precisely positioned, but rely on the rubber protrusion to cooperate with the coil spring 2. The lower spring pad 3, the coil spring 2 and the lower control arm 4 have a precise positioning structure, such as Figure 4 、 Figure 5 As shown, during assembly, it is necessary to ensure that the lower end of the coil spring 2 is aligned with the limiting structure 31 on the spring lower pad 3, and at the same time ensure that the positioning protrusion 32 at the bottom of the spring lower pad 3 is in place with the positioning hole 41 on the lower control arm 4 to ensure that the angle of the coil spring 2 meets the design requirements.

[0042] The present invention is composed of a pressure cover 5, a pressure rod 6, a nylon pad 7, an anti-rotation pressure block 8, and a bearing nut 9. The structure of each part is described in detail below.

[0043] Gland 5: The main body of the gland 5 is in the form of a disc, with a flat top and a spiral profile 51 on the bottom. The angle is consistent with the spiral angle of the coil spring 2, ensuring a good fit with the coil spring 2. The middle part is a locking structure, which mainly consists of two mutually perpendicular grooves. One groove is a straight groove 52, which is used for installing or removing the pressure rod 6, and the other groove is a locking groove 53. The locking block 61 of the pressure rod 6 slides up along the straight groove 52, rotates 90 degrees, and then descends 10mm. The locking block 61 and the locking groove 53 are in place, and the gland 5 and the pressure rod 6 are fixed in place, preventing them from loosening under the pressure of the coil spring 2, which would cause a safety hazard.

[0044] Pressure rod 6: The main body of the pressure rod 6 is a cylindrical structure, and the whole can be divided into two parts with detailed structure. The upper part is a locking block 61, which cooperates with the locking groove 53 of the pressure cover 5 to ensure that the coil spring 2 is locked in place after press-fitting to avoid detachment and safety accidents; the lower structure is a trapezoidal thread 62, which cooperates with the bearing nut 9. After the press-fitting is completed, the bearing nut 9 is tightened into place to maintain the press-fit state of the coil spring 2. At the same time, a keyway 63 is opened in the middle of the trapezoidal thread 62 along the Z direction, which cooperates with the positioning key 81 on the anti-rotation pressure block 8 to ensure that the overall auxiliary tool does not rotate relative to the coil spring 2 after press-fitting to avoid safety accidents.

[0045] Nylon pad 7 and anti-rotation pressure block 8: Nylon pad 7 and anti-rotation pressure block 8 are used together. The nylon pad 7 is put on the anti-rotation pressure block 8, and then the whole is put on the pressure rod 6, while ensuring that the positioning key 81 is in place with the keyway 63. The function of the pad and the pressure block is to serve as a lower blocking limit after the spring is pressed and installed to maintain the spring posture. The nylon pad 7 and the anti-rotation pressure block 8 are contoured and fit into the circular groove at the bottom of the lower control arm 4. The nylon pad 7 is made of nylon or polyurethane and is in direct contact with the lower control arm 4 to avoid scratches and paint peeling on parts. At the same time, it can increase the friction of the contact surface and cooperate with the key connection structure to ensure that the entire mechanism and the lower control arm 4 are fixed in place, effectively preventing the overall structure and the coil spring 2 from rotating relative to each other.

[0046] Bearing nut 9: The bearing nut 9 uses a trapezoidal thread and is embedded with an end bearing 91. The bearing nut 9 is mated with the bottom of the pressure rod 6. After the coil spring 2 is press-fitted, the bearing nut 9 is tightened into place, maintaining the press-fit position of the coil spring 2. The trapezoidal thread is used to reduce friction between the mating threads, facilitating the tightening and removal of the bearing nut 9. The end bearing 91 is used to reduce friction between the anti-rotation pressure block 8 and the bearing nut 9, facilitating the removal of the bearing nut 9 after assembly.

[0047] Assembly process of the present invention:

[0048] 1. Assemble the upper gasket 1, coil spring 2, lower gasket 3, and lower control arm 4 into place. Figure 2 As shown, ensure that the limiting structure 31 of the lower liner 3 is in place with the bottom of the coil spring 2, and ensure that the positioning protrusion 32 of the lower liner 3 is in place with the positioning hole 41 of the lower control arm 4;

[0049] 2. Use the press equipment to press the pre-installed coil spring 2 and lower control arm 4 to the set height, such as Figure 3 As shown, during the press-fitting process, it is necessary to ensure that the center line of the coil spring 2 is completely aligned with the center line of the lower control arm 4 to avoid the posture change of the coil spring 2 and ensure safe and reliable press-fitting;

[0050] 3. After press-fitting into place, place the pressure cover 5 between the second and third turns of the coil spring 2, insert the pressure rod 6 from the lower hole of the lower control arm 4, pass through the straight groove 52 of the pressure cover 5, rotate 90 degrees, and match it with the locking groove 53. Then put the nylon pad 7 and the anti-rotation pressure block 8 into the pressure rod 6 in sequence, and finally tighten the bearing nut 9 in place to ensure the posture of the coil spring 2 after press-fitting. Then release the press equipment to complete the press-fitting process. The effect after press-fitting is as follows Figure 1 shown.

[0051] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all fall within the scope of protection of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0053] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A passenger car suspension spring, characterized in that: The invention comprises a spring upper pad (1), a coil spring (2), a spring lower pad (3), a lower control arm (4), a pressure cover (5), a pressure rod (6), a nylon pad (7), an anti-rotation pressure block (8) and a bearing nut (9), wherein the top of the spring lower pad (3) is connected to the bottom of the coil spring (2), and the bottom of the spring lower pad (3) is connected to the lower control arm (4); the top of the pressure rod (6) is connected to the pressure cover (5), and the body of the pressure rod (6) passes through the coil spring (2) and the lower control arm (4) in sequence, so that the pressure cover (5) is connected to the top of the coil spring (2), the lower part of the spring upper pad (1) is connected to the top of the coil spring (2), the part of the pressure rod (6) passing through the lower control arm (4) is fastened to the lower control arm (4) through the bearing nut (9), and the nylon pad (7) and the anti-rotation pressure block (8) are sleeved on the outside of the pressure rod (6) between the lower control arm (4) and the bearing nut (9); The outer ring of the bottom of the pressure cover (5) is provided with a spiral profiling (51), which is consistent with the spiral angle of the spiral spring (2), so that the pressure cover (5) can be connected with the spiral spring (2); and a through hole for passing the pressure rod (6) is provided in the middle of the pressure cover (5), and the inner wall of the through hole is provided with a straight groove (52) and a locking groove (53) arranged at intervals; A locking block (61) is provided above the pressure rod (6), and a keyway (62) is provided inside the lower part of the pressure rod (6), wherein the top of the pressure rod (6) penetrates into the through hole in the middle of the pressure cover (5), and at this time, the locking block (61) penetrates into the straight groove (52), and then the pressure rod (6) is rotated so that the locking block (61) fits into the locking groove (53), thereby completing the fixation of the pressure cover (5) and the pressure rod (6); The nylon pad (7) is sleeved on the outside of the anti-rotation pressure block (8), and the nylon pad (7) and the anti-rotation pressure block (8) are then sleeved on the outside of the pressure rod (6) as a whole, and at the same time, the positioning key (81) on the anti-rotation pressure block (8) is matched and connected in the keyway (62); The bearing nut (9) has a trapezoidal thread inside and an end face bearing (91) embedded therein. The bearing nut (9) is fitted to the outside below the pressure rod (6) through the end face bearing (91) and the trapezoidal thread inside.

2. A passenger car suspension spring according to claim 1, characterized in that: A limiting structure (31) is provided above the spring lower pad (3), and a positioning protrusion (32) is provided at the bottom. The lower end of the coil spring (2) is aligned with the limiting structure (31), and the positioning protrusion (32) is matched and connected in a positioning hole (41) on the lower control arm (4).

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